Fix test failure with old Copy-On-Write std::string
* testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static assertion failures with old std::string ABI. From-SVN: r267577
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2019-01-04 Jonathan Wakely <jwakely@redhat.com>
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* testsuite/27_io/filesystem/filesystem_error/copy.cc: Fix static
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assertion failures with old std::string ABI.
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* include/bits/fs_path.h (path::_List::erase): Replace both overloads
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with ...
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(path::pop_back(), path::_M_erase_from(const_iterator)): New member
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@ -24,9 +24,19 @@
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using std::filesystem::filesystem_error;
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// The COW std::string does not have noexcept copies, because copying a
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// "leaked" string can throw (and for fully-dynamic strings, copying the
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// empty rep can also throw).
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// That's OK, because we know that the std::string in the std::runtime_error
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// or std::logic_error base class won't be leaked (and usually won't be empty).
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// The is_nothrow_xxx type traits don't know that though, so we can only
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// check them for the cxx11 ABI, which uses __cow_string, which has noexcept
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// copies.
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#if _GLIBCXX_USE_CXX11_ABI
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// PR libstdc++/83306
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static_assert(std::is_nothrow_copy_constructible_v<filesystem_error>);
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static_assert(std::is_nothrow_copy_assignable_v<filesystem_error>);
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#endif
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void
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test01()
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